Borosilicate Glass Rectangular Glass Plates: Borosilicate Glass (CTE 3.3 x 10^-6 /K, 360 nm – 2.0 um); Up to 600 x 400 mm, thickness 0.2 – 40 mm. Single-piece prototypes to production volumes, quoted from your drawing.
borosilicate glass rectangular glass plates are ordered for stage plates, machine guards and optical breadboards. The geometry envelope is Up to 600 x 400 mm, thickness 0.2 – 40 mm, held to length/width +/-0.05 mm, in Borosilicate Glass.
The numbers
| Material | Borosilicate Glass (3.3 expansion group per ISO 3585) |
|---|---|
| Thermal expansion (CTE) | 3.3 x 10^-6 /K |
| Service temperature | 450 C continuous |
| Transmission range | 360 nm – 2.0 um |
| Density | 2.23 g/cm3 |
| Knoop hardness | 480 kg/mm2 |
| Refractive index | 1.473 @ 587 nm |
| Stock thickness | 0.50 – 30 mm |
| Maximum blank size | 600 x 400 mm |
| Geometry | Rectangular Glass Plates |
| Size envelope | Up to 600 x 400 mm, thickness 0.2 – 40 mm |
| Key tolerance | length/width +/-0.05 mm |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
DFM notes from the shop floor
The shop-floor rules that matter here:
- Material note: sheet stock carries more thickness variation than float wafer stock, so lapping is often the first step.
- Hold the controlling dimension (length/width +/-0.05 mm) and let secondary dimensions carry standard tolerance – it is the single biggest cost lever.
- Over-specification is the quiet budget killer: a 20/10 scratch-dig face costs roughly three times an 80/50 face, so grade each surface individually.
The full rules live in our tolerance design guide and holes and edges design guide.
What the process holds
Beyond this page, Borosilicate Glass routinely runs through sandblasting, lapping, edge grinding, ultrasonic machining in our shop – most real parts combine two or three of these steps.
Production route: cnc machining, grinding, edge grinding – selected per geometry and volume. Edge condition: chamfered 0.1 – 0.5 mm as standard.
Where these parts end up
The recurring buyers of borosilicate glass rectangular glass plates: medical diagnostics (flow cells, slides, microplate bottoms, cuvette windows); scientific instruments (reference flats, cells, prism mounts, stage inserts); laboratory instruments (cuvettes, sight glasses, stir-cell windows). Background reading on the underlying material science: ISO 3585 borosilicate glass 3.3.
Dimensions still moving? Configure this part live in the 3D + 2D builder below, or open the full custom glass machining 3D + 2D builder to start from a blank canvas.
Useful companion pages: glass sandblasting, material selection guide, glass in laser systems.
Common questions
How does Borosilicate Glass behave under heat?
CTE is 3.3 x 10^-6 /K and continuous service reaches 450 C continuous, which is what drives its use where chemical durability matters.
What sizes are available for rectangular glass plates?
Up to 600 x 400 mm, thickness 0.2 – 40 mm, held to length/width +/-0.05 mm.
Is there a minimum order for borosilicate glass rectangular glass plates?
No. Single prototypes are accepted, and pricing steps down at 10, 100 and 1,000 pieces.
How fast can prototypes ship?
Machined prototypes ship in 5 – 10 working days. Coated or bonded parts add 1 – 2 weeks depending on queue slots.
Specifications on this page were last reviewed by our engineering team in August 2026.